Air pump and compressor.



No. 659,832. Patented Oct. I6, |900. G. SIPP.

AIR PUMP AND COMPRESSOR.

(Application led May B, 1900.)

(No Model.)

INVENTOR r MM #fm1/www( ATTORNEYS Asnwcnou. u. c.

Eo s t: co oro mow filiTnd STaTns PATnNT lrRANT SIPP, OF PATERSON, NEW JERSEY.

AlR PUMP AND COMPRESSOR.

SPECIFCATION forming part of Letters Patent N o. 659,832, dated October 16, 1900. Application le. May 8, 1900. Serial No. 15,898. @lo model.)

To all whom, t may concern.-

Be it known that I, GRANT SIPP, a citizen of the United States, residing in Paterson, in the county of Passaic and State of New Jersey, have invented certain new and useful Improvements in Air Pumps and Compressors; and l do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

This invention relates to manually-controlled fluid-operated pumps and compressing apparatus, and especiallyito air pumps and compressors.

The object of this invention is to provide an air pump and compressor of simple,strong, and durable construction, reliable and efficient in operation, and easily controllable.

The invention consists in the improved air pump and compressor and in the combination and arrangement of the various parts thereof, substantially as will be hereinafter more fully described and finally embodied in the clauses of the claim.

Referring to the accompanying drawings, in which like letters of reference indicate corresponding parts in each of the several views, Figure l is a central sectional view through my improved apparatus, certain parts being shown in full and others broken.

away; Fig. 2, a top plan view of the upper portion of Fig. l, a certain leather cup-valve being removed; and Fig. 3, a detail view of a certain piston-valve used in connection with my improved apparatus.

In said drawings, a represents a cylinder provided at opposite ends with heads Z9 and c, secured to the cylinder by screw-threaded connection, as shown, or in any desired and well-known manner.

Within the cylinder a is slidingly arranged a piston d, carried at one end of a piston-rod e, to the opposite end of which is secured a piston-valve f. Said piston-valve consists, preferably, of a spider g, bearing with its downwardly-extending projections g on the inner face of the cylinder a and having its central portion secured to the piston-rod e by means of a screw g2. On the top of the spider rests a plate h, provided with a series of openings 71, and supportingacup-shaped leather valve h2, the operation of which latter will be hereinafter more fully described.

The piston-rod e is surrounded by a spiral spring t', bearing against the piston (l and against a spiderj, secured within the cylinder a, as clearly shown in Fig. l.

The cylinder a is provided with a series of air-inlets m, situated below the piston-valve f, and is also provided in its lower portion with a steam-inlet n, and about midway between said st-eam-inlet and air-inlets with an exhaust n.

The cylinder-head b is provided with a nipple b', adapted to receive the compressed-air outlet-tube b2. In said nipple is arranged an auxiliary valve o, consisting of a perforated plate 0', to which is secured the central portion of a cup-shaped leather valve o2.

On one side of the cylinder a is mounted a valve-chest p, provided with ports p' p2, communicating with the ports n and n, respectively. The lower portion of said valve-chest p is provided with an exhaustps, While steam is supplied to said cylinder through a port or inlet p4. Within lthe valve-chest p is slidingly arranged a piston-valve q,penetrated by a central opening QQ and having secured thereto one end of a piston-rod q2, which vpenetrates the head g3 of the valve-chest p. Said piston-valve q is limited in its upward movement by a stop q1@ at the upper end of the valve-chest p, and in its downward movement by the plug qu, forming the lower end of said Valve-chest. The other end of said piston-rod q2 is pivotally connected, as at ([1, to a handle r, having its shorter arm fulcrumed, as at r', to a projecting bracket r2, secured to or integral with the cylinder a, as clearly shown in Figs. l and 2 of the drawings.

ln operation when a supply of compressed air is needed the piston-valve q is depressed by means of the handle r until the annular groove Q0 establishes a communication between the steam-inlet@4 and the portp2. The steam will enter through said port p2 and port n into the cylinder a and below the piston d and will force said piston upwardly against the action of the spiral spring t'. The

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air contained in the upper part of the cylinder a-that is to say, in the part between the piston-valve f and the cylinder-head b will accordingly be compressed and will be forced out of said cylinder into the tube b2 by lifting the leather cup-valve 02, as will be manifest. The piston (Z will be moved upward by the steam-pressure until it clears the exhaust-port n', when a portion of the steam will exhaust through said port and through the port ya into the valve-chest lo and from there through the central opening q" of the piston-valve q into the exhaust 193. Simultaneously the handle r is moved upwardly, thereby cutting o communication with the port p2 and preventing steam from entering into the cylinder a. As soon as a portion of the steam in the cylinder a, has exhausted in the manner heretofore described the piston d and piston-valve fwill be forced back into the normal position by means of the spiral spring t', and while so returning, a new supply of air having entered through the air-inlets m, will lift the cupshaped leather valve h2 and enter the upper chamber of the cylinder a. The portion of the steam remaining in the said cylinder a below the piston after it passes the port n' will exhaust through the ports 'n and p2 into the valve-chest p and out of the exhaust p3.

The above-described operation is repeated until the needed supply of compressed air has been pumped through the tube b2 into the reservoir or apparatus in which said compressed air is to be used.

From the foregoing it can be seen that my improved pump and compressor is single-acting-that is to say, that air is pumped or compressed only by the upward movement ofthe piston and that on account of the peculiar construction of the various parts and the arrangement of the various ports very little manual power will be required to control the steam-operated piston.

Having thus described myinvention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a fluid-pumping, compressing or other similar apparatus, the combination, with a cylinder having a valve-controlled discharge for the compressed iiuid at one end, of spaced operatively-connected pistons arranged in said cylinder, the piston adjoining the discharge end of said cylinder having a valve opening toward said discharge end of the ycylinder, a supply for an actuating duid, an exhaust for said actuating fluid, said cylinder having a port at its other end aifording common communication for the supply and exhaust with saidcylinder, and a valve controlling the communication between said port and the supply and exhaust, said valve being adapted to simultaneously close the supply and open the exhaust and Vice versa and said cylinder having another fluid-inlet opening for the iiuid to be compressed between the last-nalned end thereof and the valvecarrying piston, substantially as described.

2. In a fluid-pumping, compressing or other similar apparatus, the combination, with a cylinder having a valve-controlled discharge for the compressed fluid, of spaced operatively-connected pistons arranged in said cylinder, the piston adjoining the discharge end of said cylinder having a valve opening toward said discharge end of the cylinder, a valve-chest, a supply and an exhaust for an actuating fluid connected to said valve-chest, said cylinder and the valve-chest having a port of communication entering the former at the other end thereof, and a valve arranged in said valve-.chest and controlling the communicaton between said port and the supply and exhaust, said valve being adapted to simultaneously close the supply and open the exhaust and vice versa and having a port penetrating it, said cylinder and valve-chest having another port of communication controlled by said valve, and said last-named port and the exhaust being adapted to have commu nication through the port of said valve, substantially as described.

3, In a fluid-pumping, compressing or other similar apparatus, the combination, with a cylinder havin'g a valve-controlled discharge for the compressed iiuid at one end, of spaced operatively-connected pistons arranged in said cylinder, the piston adjoining the discharge end of said cylinder having a valve opening toward said discharge end of the cylinder, means for normally forcing said pistous away from the discharge end of said cylinder, a valve-chest, a supply for an actuating fluid and an exhaust for said actuating Huid connected to said valve-chest, said cylinder and the valve-chest having a port of communication entering the cylinder at the other end thereof, and a valve arranged in said valve-chest and controlling the communication between said port and the supply and exhaust, said Valve being adapted to simultaneously close `the supply and open the exhaust and Vice versa and having a port penetrating it, said cylinder and valve-chest having another port of communication controlled by said valve, and said last-named port and the exhaust being adapted to have communication through the port of said valve, substantially as described.

In testimony that I claim the foregoing I have hereunto set my hand this 25th day of April, 1900.

GRANT SIPP.

Witnesses:

ALFRED GARTNER, MARGARET BRITTON.

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